Citazione APA

Soars, L., & Soars, J. (2009). American Headway 1: Student book (2nd ed.). New York: Oxford University Press.

Stile di citazione Chicago

Soars, Liz, e John Soars. American Headway 1: Student Book. 2nd ed. New York: Oxford University Press, 2009.

Citazione MLA

Soars, Liz, e John Soars. American Headway 1: Student Book. 2nd ed. New York: Oxford University Press, 2009.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.